Hjálmar is an Icelandic reggae band formed in 2004 in Keflavík. Collaborations On 2 June 2012, at the concert Hljómskálinn á Listahátíð Hjálmar performed with Jimi Tenor. When he introduced Tenor, G
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee18b70c511356b82a4a609d60b679290f04809a4ae09f126d44522ac61072d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d9d610d-d497-48f8-84a5-d81812cec6cf.json and https://artists.proofprofile.net/proofs/artist/5d9d610d-d497-48f8-84a5-d81812cec6cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5266701fb09071bcce2197382b99f855c4d94e5f3131e0a8ecdcf1457958dd2f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISG220900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801249e10e11a35ea9a1b755b3f4dcbd6854178059b695a03dea4ccd776654da. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISG220900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bc503166f11339cb5ff8b80d0f1b831774febd4793754c21bb8c882f02d925. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISG220900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfe32402da5cfbd65986585360fd2561c95fe64e7e608868ed567e8ae96011f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISG110522001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2252eb9a732cb1ac0bb4beff48796bf3c9cf760de9bee14184bebb3e521df313. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISG110522003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb139fecd0b98c813b4b4187193004ed225e01845fa3bd1569ebbe98d54746309. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISG110522005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e43eb4d393f2e068f6fabc4dba35767912b7bd16f26c43a62a175e60673513d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISG110522007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553c4bfce89756fcf7de4c95872c52512fba688d86d9ffb8fd53dbb022b1582a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISA110708002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc7eb6a2f2c1a5cd09798f321e0187ec483eeb08ccc01f97bc0d136aec89f98. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISA110708003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b148eb60ded4a502c5d35a163500a1f30d72ff38b749b99d9b5641240e6cb39. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISA110708004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5abd2f1bedcdcb8bcfb50b989dd5a1cf6447cc906a830715a7c3fb2a9065359. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV460900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec052bebdcf89c5a45d371889556610dc3230e3dd458e6baf8dca93a98b3f9fa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV460900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaefe4144f477a71769b17e811039084bcaa9bd0a2bd6eca9150af937cef59b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV460900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa2de96782c71b3c368ad724d575ee3314bef745fa95d8554099090316ef8b1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV460900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cc186786e733fa131a49b83d97ab7c30fb921722f64ee09e5a9ca6dcb5f60c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV461000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe621c6f263955b6001f1d7d96ca6faf64804e94e1eeeb51fcba9cb9d6a567a1f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV461100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5918b785249be19383a279fee3dcfb9df1e7b07cb51334b7b9f356707d59e4f5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISA111401305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0f84fdcb1c4a104acf36434c0627f4d91f9677824636c0c7a62b67e83b188f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISZ981600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e182da7d570737a8a5f781893760d2de5e6ec0be292f9cb1456dbd7327a4462. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACU1627820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a1a71b99c272e6081c67b735341a9ddfd64e8f846052d88d7eb591c3cffd9a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV281701001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0c46dacb5a272777386decb65774b03397f7a38a0c77a779eb4f00b151405d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV281900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763196f723c139454a95f1af6d2921c1f7f1d8f7e698b828f209e9e17a9a5833. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV282000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf342629b7e4ecd8b4f21de8b678ac363a2f3f37185555ebbba86f3dffcad0d15. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV282000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd08b61866b597a76e35589087ff03148eb0b9c7dcaa34da0c4ed7dbe4141fb5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV442104501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80135dc4d5671ccbe84e572c2b005c043934806dd6849a932ed59e90937ef809. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV442117701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf422f9787e4a304c2e85ae0ac8ca7272512e2c6bf16b03f92b40435d6c87a55a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV442238301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4ae6281e8471c24f10998f7793bc48e7916bf5248b1a389763a241bf6a5c0e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV982447701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59732a89d560bf2304eef58d1da87d85d7e1f39b76c140e2be2f92fcb6e9fcfd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISB112506201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6466a460e50029e312906c2d4a204605938b80ee65a741eb71441b5ba1d9bee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBTF2200149.